vented exhaust tip on dmax's and flower pukes??

[Cummins Cowboy]

I have noticed both the dmax and PSD have vents that look to allow air into the exhaust stream just before it exits at the tip, I was wondering what the purpose of this is?? if anything else it should put more fresh air into the exhaust before it leaves the tailpipe thus giving the appearance of less smoke not a bad idea to help with perceptions of diesels, I was wondering if emissions are tested on these at the end of the exhaust tip and some how allowing this fresh air in could help the trucks pass emissions easier??

 

[TWilkening]

As far as I know the only reason is to cool the exhaust gases. A regenning truck in a traffic jam could be bad for the guy stuck next to you.

 

[AMink]

I thought I read somewhere that it is to lower the temp of the exhaust, especially during regen. The GMC/Chevy look ridiculous, like a rocket nozzle.

 

[Cummins Cowboy]

how come the dodges don't have them??

 

[CumminsBu]

how come the dodges don't have them??

They are tuned so good, they don't need it. :-laf

 

[HBarlow]

They are tuned so good, they don't need it. :-laf

Great answer!

 

[Bob4x4]

how come the dodges don't have them??

Don't laugh yet there are rumours starting that the Dodges may get some type of retro fit

 

[Dieselnut59]

Don't laugh yet there are rumours starting that the Dodges may get some type of retro fit

And luckily an exhaust tip is easily changed. Genos has several nice ones! Have you seen how these "rocket" tips look inside? The exhaust is "forced" into a 3" or so opening, creating a venturi effect which draws in fresh air from the openings around the larger outer pipe. A hacksaw would immediately be put to work if my truck was equipped with that pos!

 

[HBarlow]

... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... The GMC/Chevy look ridiculous, like a rocket nozzle.

Yeah, they look like something from a J. C. Whitney catalog claiming to improve mpg, horsepower, and torque.

 

[TFucili]

The GMC/Chevy look ridiculous

The whole truck!